Jobs also updated with 600,000 downloads of iBooks. The first day sales of books was 250k, so it’s keeping a bit above 1 book per device. First day apps was 1 million, so the app attach rate is now 7.8, well above the 3 from day one. Keep in mind that the iPhone attach rate grew to over 50 so it’s early days to see how iPhone compares to iPad as an app magnet.